Safety razor



Sepu 7, w43,

F. P. STEINHAUER 2,328,752

SAFETY RAZOR Filed Dec. 2l, 1942 Patented Sept; 7, 1943 UNITED STATESPATENT oEFIcE SAFETY RAZOR Fritz Philip Stelnhauer, Chicago. lll.

Application December 21, 1,942, serial No.

4 claims.

This invention relates to safety razors in which a thin centrallyapertured blade having two or more cutting or shaving edges is flrmlyheld between two clamping members so co-ordinated, one with respect tothe other, that the cutting edges come properly positioned in relationto the guarding safety surfaces of lsaid members; that the blade istransversely flexed to give the cutting edges a shearing rake or anglewith respect to the beard hairs to thus provide efficient, painless andsafe shaving. It is of utmost importance to so position the cuttingedges of the blade in relation to the guarding surfaces 'of the holdingor clamping members that the cutting edge shears oil?, so to speak, thebeard bristles instead of scraping them off like a hoe would weeds; mysafety razor will shave and shear close, without scratching or cuttingthe skin of the face, be this wrinkled or plump or even blessed withsharp-cornered jaw bones.

Another one of the important improvements in my safety razor is theprovision of a simple and efficient means for re-sharpening, stropping,the cutting edges of the blade; this means resides in the novel two-partclamping member more fully described hereafter.

The'above as Well as other novel features of my invention will be bestunderstood from the following description of a preferred embodimentthereofselected for illustration and shown in the accompanying drawings,in which- Fig. 1 is a top plan view of my improved razor;

Fig. 2 is a similar view with clamping part of the two-part bladeclamping member removed;

Fig. 3 is a top plan view of the cheek guard member;

Fig. 4 is a. detail view of the cutting face, the front, of my safetyrazor;

Fig. 5 is a detail sectional view on line 5 5 of Fig. l;

Fig. 6 is a detail sectional'view on line 6 5 of Fig. 4;

Fig. '7 is an end elevation showing the method of stropping or honingthe cutting edge of the blade; l

Fig. 8 is a perspective view of parts of the twopart flexing andclamping member, and

Fig. 9 isa perspective View of parts of another form of the two-partflexing and clamping member.

Similar numerals indicate corresponding parts -in the several views.

Numeral l indicates the handle, numeral 2 v indicates the bladesupporting. and cheek guard y 'I'he ideal angle The blade of clamp 4 topass through and the lateral depression 'l admits, in snug t, thelateral projection lli` of 5, shown in in-curved lips of ,the cheek thelather from splattering; the thus gathered readily washed out under afaucet or rake mentioned above would be when the imaginable plane of thecutting edge was at right angle, degrees, to bristles of the beard; inpractice we cannot attain that ideal condition, but the nearer we can.or do approach it the better and closer and least painful shaving weget; in my razor that ideal condition is approached to highest degreepossible in actual practice.

In Fig. 8 are shown the parts i and 5 of one form of the two-partclamping and exing member; the part 5 is provided with a laterallyconcaved flexing face ll and with lateral centrally located depressionsI5 and directly under these are the lateral projections I6, shownvinFig. 5, and a central aperture 2 I; the part is provided with a centralthreaded projection 8 and centrally located lateral projections Mprojection 8 threaded projection 2| and the proin depressions I5; thelateral projections I6 of part 5 are adapted to snugly engage in lateraldepressions 1 of the cheek guard 2.' v g Fig. 9 shows a modified form ofthe two-part clamping and flexing member; in this form the part 5I isprovided with the laterally concaved iiexing faces I and parallelgrooves or channels 9; the part 4I is provided with a central threadedprojection 8 and with parallel tongues or projections I I so dimensionedand disposed that they slidably fit into and engage in the grooves 9;when the two parts, 4I and 5I, are thus assembled they form the two-partclamping and ilex- V ing member; the part 4I is provided with lateralcentrally located projections I4 which are adapted to snugly engage inthe depressions 1 ofthe cheek guard 2. To assemble the razor, the partsd and. 5, Fig. 8, are assembled together, then held level, the threadedprojection 8 pointing upward, the centrally apertured blade is then. puton-over the projections 8 and'IB, the cheek guard plate 2 is then put onin such way that the depression 'I admits and engages the projections I6of part and the handle is then screwed onto the 8 until tight, the bladewill then become properly flexed and positioned and the cutting edges ofthe blade will be in the most efcient shaving relation to the skinguardingv surfaces of the blade holding members 2 and 5. Fig. 6 gives asectional view of the assembled razor.

In my improved construction of the safety razor the cutting edge of theflexible blade is so positioned, by the co-operative locating andflexing actions of the clamping guard 5 with the holding guard 2, thatthe much desired shearing-instead of scrapingcondition is obtained inthe highest degree possible in practice; notwithstanding this, therestill remains some slight tendency for the cutting edge to bend back,ruie, at spots where some stiff bristles of the beard are encountered;such bending back or ruling may be minute in degree, even microscopic,still the spot on the cutting edge that is ruffled, bent back, does notand cannot shear cut as do the perfectly straight parts of the cuttingedge, the shearing angle of the ruffled, bent back spots has beenchanged, away from the approximately right angle to the beard.

As one of the features of my invention I provide means for re-aligningthe ruiiied spots on the cutting edges; the clamp part 4 is soconstructed and proportioned that when the flexing part 5 is removedfrom it and the blade is then clamped to the blade supporting guard 2 bythe clamp 4 alone the blade will be heldin a straight position, as shownin Fig. 7, and its cutting edges will be in proper angular relation tothe upper face of part 4 for stropping or sharpening. By stroking therazor, so assembled, over surface of a plate glass mirror any rufilingon the edge of the blade, before referred to, will become realigned withthe rest of the cutting edge. Also, the blade may be honed and stroppedwhen it is clamped straight as above described, rst one side of theedges and then the other by reversing the blade. When the two-partflexing and clamping member shown in Fig. 9 is used in the razorcombination the flexing part .5I is removed from the clamp part 4| andthe part 4| alone is used to clamp the blade in straight 'cured eximeblade,

. for clamping the position on the cheek guard 2 for sharpening; theupper corners of thev lateral tongues II of part 4| are so proportionedand positioned that the proper angular relation for strapping isobtained.

It will be observed that the clamp 4, or the clamp 4 I, when used alonewill not flex the blade but will hold it straight on the guard member 2;the lower lateral edges of clamp 4 do not extend beyond the bladefulcrum edges of the guard 2; it is only when the flexing cap part 5 visassembled with the clamp 4 and this assembly is used blade that flexing,forming, is obtained; the lower edges that are the ends of the flexingface II of part 5 extend beyond the blade supporting fulcrums of theguard 2, the distancey that these edges extend beyond the fulcrum edgesand the curvature oi the flexing surfaces are so organized,proportioned; that the cutting edges of the blade arepositioned in themost eiilcient relation to the guard surfaces on 2 and E adjacent to thecutting edges.

I have illustrated and described the preferred construction of myinvention; various modifications may be made without departing from theadvantages in and the scope of the invention pointed out. For oneexample, the lateral tongues of the clamp 4I may be made bevel shapeinstead of the rectangular shape shown and the engaging lateral groovesin part 5| also being made bevel shape to t the bevel tongues.

I claim:

l. .A safety razor comprising a centrally apera blade supporting cheekguard member, a two-part clampingsmember, said two parts having tongueand groove engagement with each other and provided with lateralcentrally located projections for positioning the blade on the cheekguard member, and means for securing-'the clamping guard member.

l-2. A safety razor comprising a centrally apertured iiexible blade, ablade supporting cheek guard member having a lateral centrally locatedgroove and a centrally located aperture, a twopart clamping memberhaving lateral centrally located projections and a centrally locatedroundy threaded projection, said projections adapted to position theblade onthe cheek guard member, and a handle having threads at one endto engage said threaded projection to firmly clamp the blade in shavingrelation on the cheek guard member.

3. -A safety razor structure comprising a centrally apertured flexibleblade, a blade supporting cheek guard member having a lateral centrallylocated groove and a centrally located aperture, a clamping memberhaving lateral centrally located projections adapted to pass through theaperture in the blade and to engage in the groove of the cheek guardmember, and means for firmly securing the clamp member to the cheekguard member to hold the blade in straight position.

4. A safety razor structure comprising a centrally apertured exibleblade, a blade supporting cheek guard member, a two-part clamping memberhaving means for positioning .the blade on the cheek guard member andmeans for firmly securing the blade to said cheek guard member, the twoparts of said two-part clamping member having tongue and grooveengagement with each other and being separable.

FRITZ P. STEINHAUER.

stropping `or member to the cheek product having a pH value between theneutrald roasting the product to dry the same and convert point and thenormal pH value of purified com the same to dextrine.

8. 'I'he method o1' making dextrine which constarch magma, and heatingand roasting the sists in mixing and reacting starch milk with an 7.'I'he method of making dextrine which consion, the said tendered starchbeing' a reaction sists in mixing and reacting starch with -an oxproducto1' the starch and said oxidizing agent ders the same capable ofaccelerated conversion, dium producing thereby a reaction starch prodthesaid tendered starch being a reaction product uct having a pH value o1'about 6.5. filtering the of the starch and said agent, incorporatingwith starch magma, and thereafter heating. and roastthe mixture analkali medium producing thereby ing the product to dry the same andconvert the a reaction starch product having a pH value besame todextrine Y un

